ISO/TC 24/SC 8
| Project No. | ISO 7805-2:1987 |
|---|---|
| Title | <p>Describes three patterns using round (circular) and square perforations. The sizes of holes range down to 2 mm for square holes and to 0.5 mm for round holes. Five ratios of pitch to hole are specified which result in nominal open areas ranging from about 60 % to 23 %.</p> |
| Registration number (WIID) | 14702 |
| Scope | <p>Describes three patterns using round (circular) and square perforations. The sizes of holes range down to 2 mm for square holes and to 0.5 mm for round holes. Five ratios of pitch to hole are specified which result in nominal open areas ranging from about 60 % to 23 %.</p> |
| Status | Standarts spēkā |
| ICS group | 73.120 |